Online Parts Store › Phillips Machine Screw - Flat Head, 3/8"-16 x 3" Image 1 of 1 Phillips Machine Screw - Flat Head, 3/8"-16 x 3" $31.11 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Stainless Cotter Pin $169.61 Nylon Insert Locknut - Stainless 5/8-11 $35.08 Stainless Cotter Pin 1/16" x 1/2" $9.76 Flat Washer, #4, .032" Thick, OD 5/16" $6.74 Phillips Self Drilling Screw - Pan Head #10 x 1-1/4" $37.54